As I use a Palm, and Memory Map only exports to PPC, I have a method where I screenshot the area I want, and calibrate in map manager, before exporting to the Palm. I use the special OSGB settings in the manual.
I'm noticing a consistent inaccuracy in my calibrated maps when using them 'live', which I can usually sort out by nudging the map once a track has started to form. Not really a problem

However, when taking some coordinates from Cetus GPS for a geocache I was placing, I noticed the DD.MM.mmm were slightly different from the ones Pathaway was reporting, and consistently so for other locations during my trip.

When looking later, I noticed that the coords reported by Memory Map on the PC were in WSG84 format. The question therefore, is which settings do I need in map manager to calibrate Ordnance Survey GB maps from Memory Map for use in Pathaway? The special OSGB ones in the manual, or WSG84 settings?

Hi TheSnake, and thanks for replying. I think I am not following your instructions correctly. I have attached a screenshot of my map manager to show my settings.
I am putting in the grid letters SJ and the OSGB coords from Memory Map eg 36000 88000. However, as you can see, when I return to point 1 from point 2 the coords have changed. I'm not sure where I'm going wrong.

If you are calibrating maps from Memory Map for Pathaway I would really appreciate a walkthrough of the process.

I managed to get a map off the PC without it crashing. Now opening the map in Pathaway causes an immediate lock with a divide by zero error.
Going back in to Map Manager, and looking at the map I calibrated, shows that all the Northings and Eastings I entered are now exactly the same for each point, and bear no resemblance to the ones I entered. eg, 36000 88000 is now 08576 -00016. Any idea what this means?

Hi mate,
I got your email. The calibration settings look the same as I was using before, but I think the original problem (Pathaway coordinates not matching the actual GPS ones read by another program) was coming from the fact that I had 'use current map datum' ticked in Pathaway itself. I'll give it a whirl over the weekend.